Bump actions/create-github-app-token in /.github/workflows

Bumps [actions/create-github-app-token](https://github.com/actions/create-github-app-token) from 2.2.1 to 3.0.0.
- [Release notes](https://github.com/actions/create-github-app-token/releases)
- [Commits](https://github.com/actions/create-github-app-token/compare/v2.2.1...v3.0.0)

---
updated-dependencies:
- dependency-name: actions/create-github-app-token
  dependency-version: 3.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/post-release-mergeback.yml

@@ -131,7 +131,7 @@ jobs:
           echo "::endgroup::"
 
       - name: Generate token
-        uses: actions/create-github-app-token@v2.2.1
+        uses: actions/create-github-app-token@v3.0.0
         id: app-token
         with:
           app-id: ${{ vars.AUTOMATION_APP_ID }}

.github/workflows/rollback-release.yml

@@ -136,7 +136,7 @@ jobs:
 
       - name: Generate token
         if: github.event_name == 'workflow_dispatch'
-        uses: actions/create-github-app-token@v2.2.1
+        uses: actions/create-github-app-token@v3.0.0
         id: app-token
         with:
           app-id: ${{ vars.AUTOMATION_APP_ID }}

.github/workflows/update-release-branch.yml

@@ -93,7 +93,7 @@ jobs:
       pull-requests: write # needed to create pull request
     steps:
     - name: Generate token
-      uses: actions/create-github-app-token@v2.2.1
+      uses: actions/create-github-app-token@v3.0.0
       id: app-token
       with:
         app-id: ${{ vars.AUTOMATION_APP_ID }}